Makine biological Station on puffin island. 31 



nudibeanchiata. 



Mr. Clubb and I have been carrying on our observations 

 on Nudibranchs during the last year whenever opportunity 

 offered. We went to Hilbre Island on February 20th, to 

 attend the 20-foot tide. Although low water was not till 

 6 p.m. when it was rather cold and dark, we succeeded in 

 finding the following species \—Eolis papillosa (spawning), 

 Acanthopsole coronata, Coryphella rufibranchialis , Cuthona 

 nana (?), Galvina picta (two distinct colours), Dendronotus 

 arborescens (many of all sizes), Ancula cristata (very abun- 

 dant, and spawning) and Doris bilamellata (spawning). 



In regard to the other animals noticed on this occasion it 

 may be mentioned that the spawn masses of Arenicola and 

 of Scoloplos were abundant in pools on the sand. The 

 Hydroid Zoophyte Garveia nutans was also abundant. 

 This form is certainly spreading in the district and has 

 been found twice this year at Puffin Island, by Mr. 

 Thompson on April 4th, and by myself on October 26th. 

 The masses of Sabellaria alveolata at Hilbre were found to 

 be spreading and to cover a large area. Mauy young 

 colonies of Alcyonium digitatum were observed, and many 

 small specimens of Sabella. The starfishes which are 

 usually so very abundant were almost entirely absent on 

 this occasion. No young mussels, and no specimens 

 of Hydrobia were found. 



A month later, in March, we made a second trip to 

 Hilbre at a very low ebb, accompanied by Dr. Hanitsch, 

 and again succeeded in obtaining a number of Nudi- 

 branchs. We found several specimens of the rare Coryphella 

 landsburgi. This is apparently the first time this species has 

 been found in our district since the two original specimens 

 recorded by Dr. Byerley in 1849 and 1853. These new 

 specimens afforded us the opportunity of re-describing the 



